Google Gemini 3.1 Flash vs OpenAI GPT-5.1-Codex-Max — side-by-side specs.
Google Gemini 3.1 Flash | OpenAI GPT-5.1-Codex-Max | |
|---|---|---|
| Overview | ||
| Company | OpenAI | |
| Release date | Feb 26 2026 | Nov 19 2025 |
| Model type | — | — |
| Open source | No | No |
| Specifications | ||
Parameters | — | — |
Context window | — | — |
| Benchmarks | ||
| Timeline | ||
| Release gap | GPT-5.1-Codex-Max shipped 99 days before Gemini 3.1 Flash | |
Gemini 3.1 Flash and GPT-5.1-Codex-Max don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-5.1-Codex-Max shipped 99 days before Gemini 3.1 Flash, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
Direct benchmark comparisons are unavailable — Gemini 3.1 Flash and GPT-5.1-Codex-Max don't publish scores on any of the same benchmarks.